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Simon Wunderlich cd9c7bfbba batman-adv: add detection for complex bridge loops 
There are network setups where the current bridge loop avoidance can't
detect bridge loops. The minimal setup affected would consist of two
LANs and two separate meshes, connected in a ring like that:

   A...(mesh1)...B
   |             |
 (LAN1)        (LAN2)
   |             |
   C...(mesh2)...D

Since both the meshes and backbones are separate, the bridge loop
avoidance has not enough information to detect and avoid the loop
in this case. Even if these scenarios can't be fixed easily,
these kind of loops can be detected.

This patch implements a periodic check (running every 60 seconds for
now) which sends a broadcast frame with a random MAC address on
each backbone VLAN. If a broadcast frame with the same MAC address
is received shortly after on the mesh, we know that there must be a
loop and report that incident as well as throw an uevent to let others
handle that problem.

Signed-off-by: Simon Wunderlich <simon.wunderlich@open-mesh.com>
[sven@narfation.org: fix conflicts with current version]
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
 		2016-05-10 18:26:45 +08:00
..
6lowpan 6lowpan: move mac802154 header 2016-04-13 10:41:10 +02:00
9p net/9p: convert to new CQ API 2016-03-10 20:54:09 -05:00
802
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8021q vlan: propagate gso_max_segs 2016-03-17 21:05:01 -04:00
appletalk appletalk: fix erroneous return value 2016-02-18 14:59:34 -05:00
atm treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
ax25 ax25: add link layer header validation function 2016-03-09 22:13:01 -05:00
batman-adv batman-adv: add detection for complex bridge loops 2016-05-10 18:26:45 +08:00
bluetooth treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
caif net: caif: fix misleading indentation 2016-03-14 13:09:50 -04:00
can sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
ceph libceph: make authorizer destruction independent of ceph_auth_client 2016-04-25 20:54:13 +02:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
dcb
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dccp dccp: do not assume DCCP code is non preemptible 2016-05-02 17:02:25 -04:00
decnet decnet: Do not build routes to devices without decnet private data. 2016-04-10 23:01:30 -04:00
dns_resolver
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dsa net: dsa: Provide CPU port statistics to master netdev 2016-04-28 17:16:17 -04:00
ethernet eth: Pull header from first fragment via eth_get_headlen 2016-02-24 13:58:05 -05:00
hsr NLA_BINARY misuse bug in HSR 2016-04-21 13:59:08 -04:00
ieee802154 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2016-04-26 13:15:56 -04:00
ipv4 net: l3mdev: Allow send on enslaved interface 2016-05-09 22:33:52 -04:00
ipv6 ip6_gre: Use correct flags for reading TUNNEL_SEQ 2016-05-10 00:39:27 -04:00
ipx
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irda treewide: replace dev->trans_start update with helper 2016-05-04 14:16:49 -04:00
iucv af_iucv: Validate socket address length in iucv_sock_bind() 2016-01-19 14:21:08 -05:00
kcm kcm: Add receive message timeout 2016-03-09 16:36:15 -05:00
key
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l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
l3mdev net: l3mdev: Allow send on enslaved interface 2016-05-09 22:33:52 -04:00
lapb
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llc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
mpls GSO: Add GSO type for fixed IPv4 ID 2016-04-14 16:23:40 -04:00
netfilter netfilter: conntrack: remove uninitialized shadow variable 2016-05-10 01:04:04 -04:00
netlabel netlabel: do not initialise statics to NULL 2016-03-07 11:08:26 -05:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-23 18:51:33 -04:00
netrom
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nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-05-09 15:02:58 -04:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-23 18:51:33 -04:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
qrtr net: Add Qualcomm IPC router 2016-05-08 23:46:14 -04:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
rfkill rfkill: Use switch to demux userspace operations 2016-04-05 10:48:53 +02:00
rose
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rxrpc net: udp: rename UDP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
sched fq_codel: add memory limitation per queue 2016-05-08 23:49:38 -04:00
sctp sctp: prepare for socket backlog behavior change 2016-05-02 17:02:26 -04:00
sunrpc net: udp: rename UDP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
switchdev switchdev: Adding complete operation to deferred switchdev ops 2016-04-24 14:23:32 -04:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-04 00:52:29 -04:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
vmw_vsock Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
wimax
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wireless wireless: use nla_put_u64_64bit() 2016-04-25 15:09:11 -04:00
x25
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xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-09 15:59:24 -04:00
Kconfig net: Add Qualcomm IPC router 2016-05-08 23:46:14 -04:00
Makefile net: Add Qualcomm IPC router 2016-05-08 23:46:14 -04:00
compat.c
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socket.c tcp: remove SKBTX_ACK_TSTAMP since it is redundant 2016-04-28 16:06:10 -04:00
sysctl_net.c
…